Dr. Victor Clingman was a large, untidy man inclined to plumpness, with stringy blond hair and protuberant pale eyes. His office adjoined that of the Tareeg station commandant--a Low Dsala, in Hammerhead terms--and it was permeated from there with a slightly salty, vaguely perfumed moistness. Rank had its privileges; only the Low Dsala enjoyed the luxury of keeping his station work quarters damp enough to make the wearing of a suit unnecessary. The other Hammerheads waddled about the cold, dry halls completely covered, breathing through humidifiers, and were only occasionally permitted, and then after much ceremony, to enter an area in their section called the Water Room and linger there for several hours. Troy came into Clingman's office with his tool kit through the double doors designed to prevent moisture from escaping, shivering slightly as the sudden clamminess touched his skin. Clingman, engaged as usual in pecking out something on a writer, shirt sleeves rolled up on his plump arms, ranked piles of notes on the table beside him, turned a pale, unhealthy-looking face towards the door. "Mister Gordon," he said mildly, dragging the "mister" out a little as was his habit. He nodded at the wall to Troy's left. "Our recording mechanisms became inoperative again ... and just as I was in the process of noting down some very interesting fresh clues as to the probable origin of the Tareeg coup system. Will you try to attend to it?" "Right away," Troy said, his vague fears dispelled. Clingman's recorders were a standard problem; the repair parts for such items were on the _Atlas_ which had not come down into atmosphere for almost a year. There probably had been no reason to feel apprehensive about a night call to the office. It had happened on such occasions before. * * * * * He went to work, glancing over from time to time at the senior scientist who was frowning down pensively at the writer. Before the Hammerheads executed his predecessors, Dr. Victor Clingman had been head of the Biology Department on the Cassa Expedition, and his interest in the subject had not changed, though it was now centered exclusively on the life habits of their captors. The Tareegs did not seem to object to his preoccupation with them. Possibly it amused them; though Clingman had told Troy once, rather complacently, that his research already had proved to be of some usefulness to the Tareegs in answering certain questions they had had about themselves. That might also be true. On several occasions, at any rate, Troy had found either the Low Dsala or another Hammerhead officer in Clingman's office, answering the scientist's questions in high-pitched, reedy voices which always had the suggestion of a whistle in them. All of them apparently had been taught human speech, though they rarely chose to use it.